I just put an old plastic laundry soap scoop in a big container of salt for my son to use. I have him put in 2 scoops. It probably comes out to about 2 cups, maybe a little more. Try to find a place that sells bulk table salt, it's much cheaper than the dead sea salt. I want Ryan to try the dead sea salts because of all the minerals, and maybe I will just mix half and half with the table salt.